USABILITY EVALUATION OF VIRTUAL UMRAH BASED ON USER CENTERED DESIGN FROM EXPERT USER VIEW. Jurnal Teknologi, [S. l.], v. 77, n. 19, 2015. DOI: 10.11113/jt.v77.6534. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/6534.. Acesso em: 5 may. 2024.